Thanks Calab!
This theme show tech specs and logos of hardware machines, mame is a software that emulate arcades, that's why is not included.
Maybe in future I'll add arcades machines, like naomi, cps-2, ecc...
If you want to put a generic "Arcade" logo, it must be stored in HUD 1.0.0/assets/logos, and to make it visible you have to write your logo name in "art_by_system.nut" don't worry is very easy,
but for tech specs it does not have much sense writing data for all arcades in one generic area, because each machine has it's own specs.
Data specs are written in specs.nut, if anyone want to implement any kind of system I appreciate if will it share with me
I'm finishing the 1.0.3 version with a text scroller and a more colored background.